class Bound

class Bound {
    
    /**
     * @var string
     */
    private $version;
    
    /**
     * @var bool
     */
    private $isInclusive;
    
    /**
     * @param string $version
     * @param bool   $isInclusive
     */
    public function __construct($version, $isInclusive) {
        $this->version = $version;
        $this->isInclusive = $isInclusive;
    }
    
    /**
     * @return string
     */
    public function getVersion() {
        return $this->version;
    }
    
    /**
     * @return bool
     */
    public function isInclusive() {
        return $this->isInclusive;
    }
    
    /**
     * @return bool
     */
    public function isZero() {
        return $this->getVersion() === '0.0.0.0-dev' && $this->isInclusive();
    }
    
    /**
     * @return bool
     */
    public function isPositiveInfinity() {
        return $this->getVersion() === PHP_INT_MAX . '.0.0.0' && !$this->isInclusive();
    }
    
    /**
     * Compares a bound to another with a given operator.
     *
     * @param Bound  $other
     * @param string $operator
     *
     * @return bool
     */
    public function compareTo(Bound $other, $operator) {
        if (!\in_array($operator, array(
            '<',
            '>',
        ), true)) {
            throw new \InvalidArgumentException('Does not support any other operator other than > or <.');
        }
        // If they are the same it doesn't matter
        if ($this == $other) {
            return false;
        }
        $compareResult = version_compare($this->getVersion(), $other->getVersion());
        // Not the same version means we don't need to check if the bounds are inclusive or not
        if (0 !== $compareResult) {
            return ('>' === $operator ? 1 : -1) === $compareResult;
        }
        // Question we're answering here is "am I higher than $other?"
        return '>' === $operator ? $other->isInclusive() : !$other->isInclusive();
    }
    public function __toString() {
        return sprintf('%s [%s]', $this->getVersion(), $this->isInclusive() ? 'inclusive' : 'exclusive');
    }
    
    /**
     * @return self
     */
    public static function zero() {
        return new Bound('0.0.0.0-dev', true);
    }
    
    /**
     * @return self
     */
    public static function positiveInfinity() {
        return new Bound(PHP_INT_MAX . '.0.0.0', false);
    }

}